Hollow ZSM-5 zeolite encapsulated Ag nanoparticles for SO2-resistant selective catalytic oxidation of ammonia to nitrogen

被引：132

作者：

Wang, Zhong ^{[1
]}

Sun, Qiang ^{[2
]}

Wang, Da ^{[1
]}

Hong, Zhe ^{[1
]}

Qu, Zhenping ^{[3
]}

Li, Xuebing ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China

[2] Liaoning Shihua Univ, Sch Chem & Mat Sci, Fushun 113001, Peoples R China

[3] Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Sch Environm Sci & Technol, Dalian 116024, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2019年 / 209卷

基金：

中国国家自然科学基金;

关键词：

Selective catalytic oxidation of ammonia; Hollow ZSM-5; Ag-0; species; Metal-encapsulated; FACILE SYNTHESIS; CO OXIDATION; MIXED OXIDES; AG/AL-SBA-15; CATALYSTS; REDUCTION; SILVER; NOX; IMPREGNATION; PERFORMANCE; ADSORPTION;

D O I：

10.1016/j.seppur.2018.09.045

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Hollow ZSM-5 encapsulating Ag particles (Ag/ZSM-5-OH) have been successfully synthesized, characterized and tested in NH3-SCO reaction. In comparison with Ag/Al2O3 and Ag/ZSM-5-OH, Ag/ZSM-5 catalyst displayed the lowest T-100 (110 degrees C), much higher TOF and the lowest E-a. Although fresh Ag/ZSM-5-OH catalyst showed the relatively low NH3 conversion, its reaction cycles stability was significant higher than that of Ag/Al2O3 and Ag/ ZSM-5 catalysts. The hollow structure of ZSM-5 zeolite could prevent sintering and/or leaching of Ag particles during NH3 oxidation process. Zeolite membrane formed during dissolution-recrystallization process in the surface of hollow ZSM-5 could offer good separation properties for SO2. So SO2 did not diffuse into the hollow structure to be poisoned Ag catalyst, finally induced the outstanding SO2/H2O resistance.

引用

页码：1016 / 1026

页数：11

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